GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Blazer - 2WD 🢒 HVAC 🢒 HVAC Systems - Manual 🢒 HVAC Connector End Views
Table 1: A/C Compressor Clutch
Table 2: A/C High Pressure Switch
Table 3: A/C Low Pressure Switch
Table 4: Air Temperature Actuator
Table 5: Blower Motor
Table 6: Blower Motor Relay
Table 7: Blower Motor Resistor
Table 8: HVAC Control Assembly C1
Table 9: HVAC Control Assembly C2
Table 10: HVAC Control Assembly C3
Table 11: HVAC Control Assembly C4
Table 12: HVAC Control Assembly C5

A/C Compressor Clutch


Object Number: 684852 Size: CH

Connector Part Information
    • 12162017
    • 2-Way F Metri-Pack 150 Series Sealed (MED GRY)

Pin

Wire Color

Circuit No.

Function

A

BLK

350

Ground

B

DK GRN

59

A/C Compressor Clutch Supply Voltage

A/C High Pressure Switch


Object Number: 38560 Size: CH

Connector Part Information
    • 12162438
    • 2-Way F Metri-Pack 150 Series Sealed Pull-to-Seat (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

203

A/C Request Signal

B

DK GRN/WHT

762

A/C Request Signal

A/C Low Pressure Switch


Object Number: 38562 Size: CH

Connector Part Information
    • 12162440
    • 2-Way F Metri-Pack 150 Series Sealed Pull-to-Seat (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

603

A/C Low Pressure Switch Signal

B

BLK/WHT

351

Ground

Air Temperature Actuator


Object Number: 281207 Size: CH

Connector Part Information
    • 12040953
    • 6-Way F Micro-Pack 100 Series (BLK)

Pin

Wire Color

Circuit No.

Function

5-6

--

--

Not Used

7

BLK

1850

Ground

8

LT BLU

733

Air Temperature Door Position Signal

9

--

--

Not Used

10

BRN

341

Ignition 3 Voltage

Blower Motor


Object Number: 62489 Size: CH

Connector Part Information
    • 12066681
    • 2-Way F Metri-Pack 630 Series, Sealed, Pull-to-Seat (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

65

Blower Motor Supply Voltage

B

BLK

850

Ground

Blower Motor Relay


Object Number: 39685 Size: CH

Connector Part Information
    • 12110539
    • 5-Way F Metri-Pack 280 Series, Flex Lock (BLK)

Pin

Wire Color

Circuit No.

Function

30

PPL

65

Blower Motor Supply Voltage

85

BLK

850

Ground

86

ORN

52

High Blower Motor Control

87

ORN

540

Battery Positive Voltage

87A

DK BLU

101

Blower Motor Supply Voltage

Blower Motor Resistor


Object Number: 39662 Size: CH

Connector Part Information
    • 12048412
    • 4-Way F Metri-Pack 480 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

72

Medium 2 Blower Motor Control

B

BRN

64

Low Blower Motor Control

C

DK BLU

101

Blower Motor Supply Voltage

D

TAN

63

Medium 1 Blower Motor Control

HVAC Control Assembly C1


Object Number: 362756 Size: CH

Connector Part Information
    • 12191271
    • 10-Way Printed Circuit Connectors Bow Series, Pull-to-Seat (GRY)

Pin

Wire Color

Circuit No.

Function

1

GRY

1220

I/P Lamp Fuse Supply Voltage - 2

2-4

--

--

Not Used

5

BLK

1050

Ground

6-10

--

--

Not Used

HVAC Control Assembly C2


Object Number: 362749 Size: CH

Connector Part Information
    • 12162512
    • 3-Way F Metri-Pack 480 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

203

A/C Request Signal

B

BRN

64

Low Blower Motor Control

C

BRN

141

Ignition 3 Voltage

HVAC Control Assembly C3


Object Number: 38598 Size: CH

Connector Part Information
    • 12034146
    • 3-Way F Metri-Pack 280 Series Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

341

Ignition 3 Voltage (Except Base Pickup)

B

LT BLU

733

Air Temperature Door Control

C

BLK

1050

Ground

HVAC Control Assembly C4


Object Number: 232132 Size: CH

Connector Part Information
    • 12020813
    • 5-Way F Metri-Pack 630 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

52

High Blower Motor Control

B

LT BLU

72

Medium 2 Blower Motor Control

C

TAN

63

Medium 1 Blower Motor Control

D

--

--

Not Used

E

BRN

64

Low Blower Motor Control

HVAC Control Assembly C5


Object Number: 73210 Size: CH

Connector Part Information
    • 12059162
    • 4-Way F Micro-Pack 100 Series (BLU)

Pin

Wire Color

Circuit No.

Function

1

GRY

1220

I/PLamp Fuse Supply Voltage - 2

2

BRN

341

Ignition 3 Voltage

3

WHT

193

Rear Defogger Relay Control

4

BLK

1050

Ground